Thunbergia Plants - Black-eyed Susan, White

Thunbergia alata ‘White’ — Black-eyed Susan Vine — is a vigorous, free-flowering tropical vine producing classic white blooms with a bold black eye throughout summer and fall. Reaches 1½ inches in diameter per flower; blooms profusely over a long season. An excellent choice for trellises, window boxes, hanging baskets, groundcover, and mailbox or column decoration. Heat tolerant and easy to grow. Perennial in frost-free zones; annual in colder climates. Shipped as a live plant.

Plant Highlights

• Classic white petals with bold black eye — flowers to 1½ inches in diameter
• Vigorous vining habit — 60–84 inches tall; blooms profusely over a long season
• Excellent for trellises, window boxes, hanging baskets, groundcover, and containers
• Heat tolerant; easy to grow; perennial in frost-free zones

Planting & Care Guide

Light: Full sun. In hot, dry climates provide partial afternoon shade.

Soil: Average, well-drained soil; pH 6.1–7.8. Loamy soil preferred.

Planting: Set transplants 3 inches away from supports; space 8–12 inches apart. Pinch the tips of young plants to encourage branching.

Water: Keep seeds moist until germination; provide consistent moisture once established.

Planting Specs

• Type: Tender perennial (annual in zones below 10)
• USDA Zones: 3–10 (annual); perennial in frost-free zones
• Height: 60–84 inches (vining)
• Bloom season: Summer through fall
• Bloom color: White with black eye
• Light: Full sun
• Soil: Loamy, well-drained, pH 6.1–7.8
• Spacing: 8–12 inches
• Germ temp: 75–80°F | Avg. germ time: 14–21 days
• Planting depth: ¼ inch | Sowing rate: 3 seeds per plant